Xavier Thames scored 31 points, including 10 in overtime, and the seventh-ranked Aztecs held off pesky Utah State 74-69 for their 17th straight victory.
The senior point guard made the go-ahead basket in the extra session to help San Diego State (18-1, 7-0 Mountain West) win for the 16th time in their last 17 overtime games.
Spencer Butterfield had 19 points and Jalen Moore added a career-high 16 for the Aggies (12-7, 2-5), who lost at home for the second time this season.